题目:
Because he didn't finish the work on time and was fired by the company, he was very ______ about it. [ ]
A. upset
B. worrying
C. anxious
D. nervous
答案:
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答案:D题目分析:结合具体变化过程,对应图像分析。A、高锰酸钾受热后,会分解成锰酸钾、二氧化锰和氧气,氧气的逸出使固体质量减少,但是最后剩余锰酸钾和二氧化锰,固体减少到一定的程度,就不再减少了,故A错...